Electrical connecter plug



June 21, 1938. s. M. DE LYCAMP ELECTRICAL CONNECTER PLUG Filed April 2, 195 6 lnvenia 7':

Gcaipl'ohelffiel ca mp. 29%

Patented-JuneZi, 1938 v PATENTiQFFlCE EIEOTBICAL CONNECTED PLUG Scipione M. Del Camp, Maywood, 111., assignor toCinch Manufacturing garporation, Chicago.

' 111., a corporation 01 min 7 Application April 2, 1938, SerialNo. 12,826

My invention relates toan improved plug for electrical connections.

. One of the objects of my invention is to provide an electrical plug which is constructed in a way. to prevent physical contact between the operator's fingers and the prongs of the plug when the plug is inserted into or removed from a cooperating electrical socket. The use or such a device is particularly desirable when one or more of the '10 plug prongs carries a relatively high voltage.

Referringto the drawing, in which I have illustrated a preferred embodiment of my inven tion:- 1

Fig. 1 is a plan view of my improved electrical plug member;

Fig. 2 is a section taken on the lin 2-! of Fig. 1;

Fig. 3 is a bottom plan view of the plug member shown in Fig. 1; I

Fig. 4 is a section taken along the line 4-4 of Fig. 2; 1 1 g Fig. 5 is a plan view of the container part of my plug member; V

Fig. Bis a bottom plan view of the container shown in Fig. 5; and

Fig. 'l is a sectional view of the container shown in Fig. 5. 1

Referring now in detail to the drawing, I have shown in Figs. 1-3 an electrical plug member having a housing part in the form of a sheet 30 metal container I which may be of a tubular or any other suitable..shape. The container I is provided. in my preferred form, with a peripheral flange 2 formed from the material or the container adjacent to an open end (Figs. 5 and '1).

35 Aninsulating platelisdisposed within theflange 2 and is held in fixed assembly therewith by means of a plurality of finger-shaped elements 4 integral with the material of the container at the open end and bent over, as shown in Figs. 2

and 4, to engage one face of the insulating-plate 3. An opening 5 is extruded on the side or end of the container l directly opposite to the end carrying the plate 3 to allow the entrance of a wire or group of wires into the container.

' 45 1 The main feature of my invention is the relatively large insulating plate 6 which is fixed at the open end of the container l in substantially adjacent relation to the plate]. A pluralityof contact prongs l is carried by the plates s and s and adapted for contact with cooperatin contact of a socket member (not shown). Each of the contact prongs l is turned over at one of its free ends so as to provide a head portion I engaging one surface of the plate Theshankofeachprongliscollapsedto formaperlpheralbeadlata tion on its lengthso that the bead willlie adiaccnt-to the outsidesurface of the plate 6.1a.

(01. 173-361) V j I most clearly shown in Figs. 1 and 2. After the the apertures II is to provide a space for receiving the elements 4 when they are bent to engage the plate 3 so that they will not interfere to preventdisposition of the plate 8 in adjacent v relationshipto the plate 8.

The plate 6 is purposely formed of such dimensions as to make the prongs 'l inaccessible to the fingers oi the operator when the container I, or the plate 8 itself, is grasped for engagement with or removal from a socket member, not shown.

For this reason it will be noticed that the plate I is of substantially greater diameter than the diameter of the container l adjacent to its open end and forms a peripheral flange around the container I at the open end (Figs. 1-3) with the result that the operator's fingers, when in contact with the container l, are prevented from slipping over the edge and touching any one of the prongs 1. Thus it will be seen that as a result of my invention 1 have provided a simple and inexpensive means for carrying out the purpose in mind.

Although. I have illustrated and described a preferred embodiment of my inventionJ do not wish to be finiited thereby because the scope of my invention is best defined in the following claim.

I claim:

A plug for electrical connections including a tubular sheetmetal container having an open end. aplurality of fingers integral. with one of said open ends, an insulating plate of small diameter and an insulating plate of large diameter a in fixed assembly with said container at said open end, said large plate having a number of Y apertures locatedat predetermined points withprongs having integralmeans said plates between them whereby said plates are held in assembled relation. said large plate having a diameter substantially larger than said container adjacent said open end.

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